WJEC Unit 1.1 Chemistry

There are three types of particles, what are they?

• Proton

  Neutron

  Electron

• Atoms

  Molecules

  Ions

• Atomic

  Molecular

  Iconic

• Particles

  Molecules

  Atoms

Which particles are the smallest particles of elements.

• Atoms

• Particles

• Neutrons

• Electrons

Is is not possible to split atoms into anything smaller.

• Yes

• No

What are small groups of atoms that are chemically bonded together?

• Atoms

• Molecules

• Particles

• Ions

You can have molecules of elements or molecules of compounds, Which one shows a molecule of elements?

• O₂

• CO₂

• C

• O

You can have molecules of elements or molecules of compounds, Which one shows a molecule of compounds?

• O₂

• C

• CO₂

• O

What are formed when atoms gain or lose electrons

• Weight

• Icons

• Ions

• Heat

• When atoms lose an electron or several electrons, the resulting ion is

• Negatively charged

• unchanged

• uncharged

• Positively charged

• When atoms gain an electron or several electrons, the resulting ion is

• Negatively charged

• unchanged

• uncharged

• Positively charged

• The size of the charge on the ion is equal to ....

• • the number of electrons gained.

• • the number of electrons lost or gained.

• • the number of protons lost or gained.

• • the number of electrons lost